Very nice theme Sycho (as well as the others, specially NightBreeze), love the night-mode option...
Two things:
1. A minor correction: there should be a way to see avatars always as a perfect circle and not "ovals" when the image isn't square. I've accomplished this at our forum (see signature), and have tried to emulate the same css on yours but somehow can't reach it.
2. A suggestion... option for fixed navbar on top... it would help a lot specially on mobile (elements forum name/logo + profile + unread + search available at any time, eventually even mentions + alerts, which we have on our forum), but also on desktop, here it would be interesting to have different navbars whether one is on board/messageindex or on post view (where it is also interesting to see which topic you're into... a bit like apple discussions website thread view)